6
HAYABUSA & ITOKAWA Hayabusa is a Japanese mission to the asteroid Itokawa, arrived Sept. 12, 2005 Asteroid is 540 x 270 x 210 meters Images available (see below) Plan is to bring samples of the asteroid surface back to Earth. Arrived June 13, Particles in canister, under analysis. Surface is very rough & studded with boulders 6

7
ASTR 101-3, FALL 20107

8
8

9
a) beyond the orbit of Neptune. b) between Earth and the Sun. c) between Mars and Jupiter. d) in the orbit of Jupiter, but 60 degrees ahead or behind it. e) orbiting the jovian planets in captured, retrograde orbits. Most asteroids are found Question 7

10
a) beyond the orbit of Neptune. b) between Earth and the Sun. c) between Mars and Jupiter. d) in the orbit of Jupiter, but 60 degrees ahead or behind it. e) orbiting the jovian planets in captured, retrograde orbits. Question 7 Most asteroids are found The Asteroid Belt is located between 2.1 and 3.3 A U from the Sun.

11
Question 8 The asteroid belt is evidence of a) a planet that once orbited the Sun but later was destroyed. b) ancient material from the formation of the solar system. c) a collision between Jupiter and one of its larger moons. d) comets that were trapped by Jupiter’s gravitational field.

12
Question 8 The asteroid belt is evidence of a) a planet that once orbited the Sun but later was destroyed. b) ancient material from the formation of the solar system. c) a collision between Jupiter and one of its larger moons. d) comets that were trapped by Jupiter’s gravitational field. Asteroids, meteoroids, and comets may have not changed at all since the solar system formed.

15
ASTR 101-3, FALL 2010 REMEMBER ! Meteorites are a major source of abundance information for the solar system The age of the solar system comes from radioactive dating of elements in “chondrules” in carbonaceous chondrites. The age is 4.56 x 10 9 years. The chondrules are estimated to have formed very quickly in the early solar system. The age is a crystallization age. 15